package com.heima.app.gateway.filter;
/*
    
 需求描述：
 @Author: wang
 @Date: 2022/10/11 11:27
 
 */

import com.heima.app.gateway.utils.AppJwtUtil;
import io.jsonwebtoken.Claims;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.RequestPath;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import java.util.List;

@Component
public class AuthorizeFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        // 判断是否为登录请求
        if (request.getURI().getPath().contains("login_auth")) {
            return chain.filter(exchange);
        }else {
            String token = exchange.getRequest().getHeaders().getFirst("token");
            Claims claimsBody = AppJwtUtil.getClaimsBody(token);
            try {
                int status = AppJwtUtil.verifyToken(claimsBody);
                if (status==1||status==2){
                    response.setStatusCode(HttpStatus.UNAUTHORIZED);
                    return response.setComplete();
                }else {
                    Object userId = claimsBody.get("id");
                    ServerHttpRequest httpRequest = request.mutate().headers(httpHeaders -> httpHeaders.add("userId", userId.toString())).build();
                    exchange.mutate().request(httpRequest).build();
                    return chain.filter(exchange);
                }
            } catch (Exception e) {

                e.printStackTrace();
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();

            }

        }
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
